import Modification from '../../modification';
import * as Shift from 'shift-ast';
export default class StringDecoder extends Modification {
    private encodingFunctionProps?;
    /**
     * Creates a new modification.
     * @param ast The AST.
     */
    constructor(ast: Shift.Script | Shift.Module);
    /**
     * Executes the modification.
     */
    execute(): void;
    /**
     * Looks for a JS-Obfuscator XOR string encoding function.
     */
    private findStringEncodingFunction;
    /**
     * Undoes various string operations.
     */
    private undoStringOperations;
    /**
     * Returns whether a node is an obfuscated reversed string.
     * @param node The AST node.
     * @returns Whether.
     */
    private isReversedString;
    /**
     * Returns whether a node is a string broken down into char codes.
     * @param node The AST node.
     * @returns Whether.
     */
    private isCharCodesString;
    /**
     * Returns whether a node is the JS-Obfuscator XOR string encoding function.
     * @param node The AST node.
     * @returns Whether.
     */
    private isXorStringEncodingFunction;
    /**
     * Returns whether a node is a call of the string encoding function.
     * @param node The AST node.
     * @returns Whether.
     */
    private isStringEncodingFunctionCall;
}